| 施立志.松辽盆地齐家地区“四史”模拟及其地质意义研究[J].地质与勘探,2019,55(2):661-672 |
| 松辽盆地齐家地区“四史”模拟及其地质意义研究 |
| Numerical simulation of geohistory of the Qijia area in the Songliao Basin and geological significance |
| 投稿时间：2018-05-09 修订日期：2019-01-08 |
| DOI：10.12134/j.dzykt.2019.02.021 |
| 中文关键词: 埋藏史 地层压力演化史 成熟度演化史 油气运聚史 齐家地区 松辽盆地 |
| 英文关键词: strata burial history, stratigraphic pressure evolution history, history of maturity, hydrocarbon migration history, Qijia area, Songliao basin |
| 基金项目:国家自然科学基金项目(编号: 41572098); 中国地质调查局地质调查项目(编号: 202016000000180202；DD20160168)联合资助 |
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| 中文摘要: |
| 为确定齐家地区高台子油层的油气成藏规律，应用IES petromod成藏模拟软件开展了地层埋藏史、压力演化史、成熟度演化史及油气运聚史“四史”模拟工作。埋藏史模拟结果表明：齐家地区经历了“3降2升”的地质埋藏过程，三个沉降期分别是：泉头组沉积末期-嫩江组沉积末期、四方台组-明水组沉积末期及依安组沉积末期-现今，两次构造抬升时期是嫩江组沉积末期、明水组沉积末期-依安组沉积末期；地层压力演化具有幕式的变化特征，青山口组二+三段地层随着埋深的增加，地层压力在嫩江组沉积末期达到峰值，后因嫩末构造运动的影响，地层压力开始减小，其后，又随着地层埋深的增加，地层压力逐渐增大，开始另一幕的形成，在明水组沉积末期，地层压力达到最大；成熟度演化史表明：嫩三段-嫩四段沉积时期，青一段烃源岩开始进入生烃门限，到明水组沉积末期，齐家-古龙凹陷一带烃源岩的镜质体反射率高达1.0％-1.3％，有机质成熟的范围也进一步扩大；油气运聚史表明，齐家地区高台子油层主要有嫩江组沉积末期、明水组沉积末期两次油气运聚成藏过程，其中明水组沉积末期，油气运聚范围最广，油气由生烃中心齐家-古龙凹陷向其两侧进行大规模的侧向运移聚集，形成了环凹陷周边的一系列油气藏。 |
| 英文摘要: |
| To reveal the law of oil and gas accumulation of the Gaotaizi oil layer in the Qijia area, Songliao Basin, this work has conducted simulations of histories of strata burial process, stratum pressure evolution, maturity change and hydrocarbon migration using IES Petromod software. Results show that the Qijia area has undergone “three subsidence and two uplifts” in the burial process, which were in K1q-K2n5, K2s-K2m and Ey-Q for subsidence and end of K2n5 and end of K2m- Ey for uplift, respectively. The evolution of formation pressure was characterized by episodic changes. With the increase of buried depth, formation pressure of K2qn2+3 reached the first overpressure peak at the end of the K2n5. Affected by the tectonic movement of the late K2n5, the formation pressure began to decrease gradually. Subsequently, with the increase of the depth of strata, the formation pressure gradually increased again and the another episode began. At the end of sedimentation of K2m, the formation pressure reached the maximum. During the period of K2n3- K2n4, the source rocks of K1qn1 began to enter the threshold of hydrocarbon generation. By the end of K2m, the reflectance of the K1qn1 source rocks of the Qijia – Gulong sag was as high as 1.0%-1.3%, and the range of organic maturation was further enlarged. The simulated history of oil and gas hydrocarbon migration and accumulation shows that the late stages of K2n5 and K2m were two periods of accumulation of oil and gas in the Gaotaizi oil layer. Of them, at the end of K2m, petroleum migration and accumulation were the most widespread, when large-scale oil and gas from the Qijia-Gulong depression hydrocarbon generation center moved to either side, forming a series of reservoirs surrounding the depression. |
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